How to sort correctly arrays in JavaScript?

This content originally appeared on DEV Community and was authored by Pierre-Henry Soria

Today we’re going to look at how to sort arrays (and numbered arrays) in JavaScript. Finally, we’ll see how to sort arrays containing objects by adding an attribute, such as priority or order, to display these objects in the desired order.

Array.prototype.sort() is a comparison function used to sort elements of an array.

The arguments of this function are:

• compareFunction(a, b) < 0: a comes before b
• compareFunction(a, b) > 0: b comes before a
• compareFunction(a, b) = 0: the order of a and b is identical.

Examples (descending and ascending sorting):

const array = [1, 20, 8, 15, 25, 80, 100, 200];
// sort in descending order
array.sort((a, b) => b - a);
console.log(array);

const array = [1, 20, 8, 15, 25, 80, 100, 200];
// sort in ascending order
array.sort((a, b) => a - b);
console.log(array);

Excellent happy coding!

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This content originally appeared on DEV Community and was authored by Pierre-Henry Soria